Gas producer



M 28, 1925. v H. GOEHTZ GAS PRODUCER Filed April 20, 1922 lumen/Z01: HT604111752 Patented ,i'ui zs, 1925.

UNITED STATES l,547,213 PATENT OFFICE.

'HERMANN GOEHTZ, F BERLIN-SGHONEB ERG; GERMANY.

GAS PRDDUCER.

-Application filed April as, 1322. Sea-Balm, 555,771.

vide an im roved gas producer of the underfeed type in which the fuelissupplied continuously b mechanical means.

Compare with the known apparatus of this type, the improved gas producerworks in the reverse direction. The blast is led to the surfaceof thefuel that has been reduced to ashes, and the ashes are simultaneouslyremoved from the gas producer at that point.

A constructional form of the improved gas producer according to thisinvention is illustrated by way of example in the accompanying drawingin vertical section.

Referring to the drawing, the producer shaft '1, the cross-sectionalarea of which increases towards the top, has an upper part 2 ofrefractory brickwork, its lower part 3, which is provided with outletopenings 31 for the gas, being iron. A fuel-feed pipe 4 having amouthpiece 5 is connected up to the lower part '3 of the shaft so as toform a continuation thereof.

Around-the lower part 3 9f the shaft is an annular chamber 6 enclosed bythe cylindrical sheet metal casing 7 and a base plate 8. This annularchamber 6 which also serves asa gas receiver, is extended downwardly soas partly to surround the fuel feed pipe 4 for the purpose of preheatingand drying the fuel. Instead of the gas receiver 6 surrounding the upperportion of the fuel feed pipe 4, a separately heated chamber may beprovided, which at its maximum temperature will produce partial drydistillation of the fuel in the pipe 4. From the gas receiver 6 the gasis drawn through the pipe 9 into the main 10.

The fuel is fed to the producer by means of a rotary feed plunger 11having a lower screw-threaded portion 11 which fits into an internallyscrew-threaded pedestal 1:2, The feed plunger ll-is provided with adriving gear 13 by means of which it can be rotated and simultaneouslyraised and lowered by the interaction of the screw-threaded portion 11with the internal screwthread of the pedestal 12. The fuel is suppliedby means of a hopper 14 to a feed tray 15 having a base plate 16 inwhich the feed plunger is guided. The fuel is passed -to the centre ofthe feed tray 15 above the piston 11 by means of a revolving annularmember l'Z supported on antifriction rollers and fitted. with a numberof scraper blades 19 fixed to scraper arms 18.

In the operation of the improved gas producer, the feed plunger 11 movescontinuously up and down, and receives from the base plate 16 of thetray 15 a. determined quantity of fuel which it forces into themouthpieceb and thence to the shaft 1.

In order to prevent the fuel that has already been fed by the plungerfrom dro ping back, the cross-section of the mout piece 5 is increasedabove its inlet end in] such a'manner that an annular surface 20' isformed which provides a supporting ledge for the fuel.

It is necessary for the piston 11'to rotate in order to help it detachitself from the 7 fuel. The top 21 of the piston 11 is pref-- 90 erablyconvex in order that the bottom surface of the fuel in the mouthpiece 5will be concave. In the case of dry fuel, such fuel is preferablymoistened with a liquid such as water, 011, tar, and the like, at itssurface'of contact with the piston.

The lower part of the generator has a very much smaller diameter thanthe ugpler part, and therefore, in order that the 21 shall not bepressed up into the shaft in the form of a core of smaller crosssectional area which, on arrivingat the top, would break up and rollabout inside the shaft distributing means are provided in the shaft,

consisting of a pointed solid core 22 from 05 which partitions 23 extendradially out wards. Between these radial partitions 23 are arrangedconcentric partitions 24: held in place by means of tongue-a-nd-groovejoints.

The paititions 2-l may be set at any desired I angle to the vertical forthe purpose of deflecting the ascending fuel more towards the centre ormore towards the outside as required.

The radial partitions constitute gas. outlets which communicate with theoutlet openings 31 in the lower part 3 of the producer. By this means anexceedingly uniform withdrawal of the gas is provided for over theentire cross section of 110 the shaft.

The air for the generation of gas-1s sup- 23 are hollow and v is open atthe top "to admit the air for the generation of gas and allow thedischarge of the ash, means for feeding the fuel from the bottom towardsthe top of the shaft, means for withdrawing the gas from below the ashzone without passing through the ash zone, whereby the combustion iscaused to take place at the top of the shaft, the ash zoneto remain atthe top of the shaft, and the air to be supplied to the fuel through theash zone. 1

2. A gas producer of the downward combustion type having the ash zone atthe top of the producer shaft comprising-in coinbination a producershaft the cross-sectional area of which increases towards the top and isopen at the top to admitthe air for the generation f gas and allow thedischarge of the ash, means for feeding the fuel from the bottom towardsthe top ofthe shaft, means comprising apertures in the narrow part ofthe producer shaft below the ash zone for is open at the top to admitthe air for the generation of gas and allow the discharge of the ash, afuel-feed tube delivering into the lower part of the producer shaft, anda, feedplunger capable of rotating and moving vertically into the lowerend of said fuel-feed tube for feeding the fuel from the bottom towardsthe top of the shaft, means comprising apertures in the narrow part ofthe producer shaft below the ash zone for withdrawing the gas withoutpassing through the ash zone, whereby the combustion is caused to takeplace atthe top of the shaft, the ash zone to remain at the top of theshaft, and the air to be supplied to the fuel through the ash zone, asset forth.

in testimony whereof I have signed my name to this specification.

HERMANN GOEHTZ. ll'itncsses I'll-ms \Vnumn, KARL MARTENA.

